Hey guys my 3GS touchscreen died, and the earliest I can get an appointment at the apple store is on Sunday. (just freaking great.) A full restore fixes the screen for a few hours and it degrades back to not being able to 'slide to unlock'. Idk why or how this can even happen. Can i pop my Sim into my old 1G iphone and get it to work? Will I run into problems with At&ts text and data plan? (USA). Thanks for your help.